CA2368085C - Wound treatment apparatus employing reduced pressure - Google Patents

Wound treatment apparatus employing reduced pressure Download PDF

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Publication number
CA2368085C
CA2368085C CA002368085A CA2368085A CA2368085C CA 2368085 C CA2368085 C CA 2368085C CA 002368085 A CA002368085 A CA 002368085A CA 2368085 A CA2368085 A CA 2368085A CA 2368085 C CA2368085 C CA 2368085C
Authority
CA
Canada
Prior art keywords
cover
apparatus
envelope
wound
comprises
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CA002368085A
Other languages
French (fr)
Other versions
CA2368085A1 (en
Inventor
Keith Patrick Heaton
Kenneth William Hunt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KCI Licensing Inc
Original Assignee
KCI Licensing Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to GBGB9909301.5A priority Critical patent/GB9909301D0/en
Priority to GB9909301.5 priority
Application filed by KCI Licensing Inc filed Critical KCI Licensing Inc
Priority to PCT/GB2000/001566 priority patent/WO2000064394A1/en
Publication of CA2368085A1 publication Critical patent/CA2368085A1/en
Application granted granted Critical
Publication of CA2368085C publication Critical patent/CA2368085C/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/00051Accessories for dressings
    • A61F13/00085Accessories for dressings having means for facilitating the application on the skin, e.g. single hand handling facilities
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/00004Non-adhesive dressings
    • A61F13/00021Non-adhesive dressings characterized by the structure of the dressing
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/00051Accessories for dressings
    • A61F13/00068Accessories for dressings specially adapted for application or removal of fluid, e.g. irrigation or drainage of wounds, under-pressure wound-therapy
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/10Bandages or dressings; Absorbent pads specially adapted for fingers, hands, or arms; Finger-stalls; Nail-protectors
    • A61F13/104Bandages or dressings; Absorbent pads specially adapted for fingers, hands, or arms; Finger-stalls; Nail-protectors for the hands or fingers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/008Drainage tubes; Aspiration tips
    • A61M1/0088Drainage tubes; Aspiration tips with a seal, e.g. to stick around a wound for isolating the treatment area
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M27/00Drainage appliances for wounds or the like, i.e. wound drains, implanted drains
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F2013/00089Wound bandages
    • A61F2013/0017Wound bandages possibility of applying fluid
    • A61F2013/00174Wound bandages possibility of applying fluid possibility of applying pressure
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F2013/00361Plasters
    • A61F2013/00365Plasters use
    • A61F2013/00519Plasters use for treating burn
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F2013/00361Plasters
    • A61F2013/00365Plasters use
    • A61F2013/00536Plasters use for draining or irrigating wounds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F2013/00361Plasters
    • A61F2013/00365Plasters use
    • A61F2013/0054Plasters use for deep wounds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F2013/00361Plasters
    • A61F2013/00544Plasters form or structure
    • A61F2013/00574Plasters form or structure shaped as a body part

Abstract

Apparatus is described for stimulating healing of wounds, particularly burns, to the hands or feet.
The apparatus comprises an envelope for receiving the affected part of the body. The envelope (12) comprises an air-tight cover which contains a porous pad (22, 24, 26) for covering the wound. Means are provided for connecting the interior of the envelope to a source of suction.

Description

WOUND TREATMENT APPARATUS EMPLOYING REDUCED PRESSURE
FIELD OF THE INVENTION
The present invention relates to an apparatus for the healing of wounds and more particularly to preventing progression of partial-thickness burns.
DESCRIPTION OF RELATED ART
Where a person suffers a burn, the dermal and epidermal layers in the region of the wound are damaged. Closure of the resulting wound is important to prevent loss of body fluids and invasion by micro-organisms. In the case of a partial-thickness burn, epithelial and subcutaneous tissue adjacent to the wound will migrate outwards and eventually grow new tissue over the wound. A wide array of wound coverings has been developed to expedite wound closure and allow the natural processes of repairing the damaged tissue to proceed.
The prognosis of a wound caused by a burn depends on the severity of the injury and particularly the depth of the burn. In general, a partial-thickness burn will heal more quickly and with less complications than a deeply penetrating burn. It has been observed that partial-thickness burns often deteriorate and become more serious, deeper burns, if not treated promptly after incurring the burn injury.
The hands more often suffer burn injuries than other parts of the body.
Probably,~this is due to the natural reaction of attempting to protect the face with the hands and, in many cases, the burn injury is to the back of the hands. Other parts of the body which more frequently suffer burns may be the arms, feet and legs.
The present invention seeks to provide apparatus for treating injuries to a part of the body, especially injuries caused by burns.

BRIEF SUMMARY OF THE INVENTION
According to one aspect of the invention there is provided an apparatus for stimulat-ing healing of wounds which comprises an envelope for receiving an affected part of the body, said envelope including a substantially air-tight cover and a porous pad within the cover, said cover being adapted to contact the wound surface, and connection means for connecting the interior of the envelope to a source of negative pressure.
By substantially "air-tight" cover is meant one which is sufficiently air-tight that by applying suction to the porous pad, a pressure below ambient can be maintained within the envelope. It is not, however, necessary for the material of the envelope to be totally air occlusive.
It has been found that when negative pressure therapy using the apparatus of the invention is applied to a burn within a relatively short time of incurring the injury (e.g. within about 12 hours), not only is the rate of healing improved but progression of a partial-thickness burn to a deeper injury is arrested.
In one embodiment, the apparatus of the invention, the envelope comprises a glove, sleeve or sock. For example, the apparatus may include a glove formed from a flexible plastics or rubber foam which is contained within a cover of low air-porosity.
Typically, the flexible plastics foam is a polyurethane or polyvinyl alcohol (pva) foam having intercommu-nicating cells or a combination of such foams, e.g. as a laminate. In such a laminate, the pva layer may be adj acent the wound.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
Additional features of the present application will become apparent from the follow-ing description and accompanying drawings, in which:

Figure 1 is an exploded perspective view of the porous pad;
Figure 2 is a perspective view when the porous pad is assembled together;
Figure 3 is a perspective view of the porous pad within its cover;
Figure 4a to 4d show various views of a connector for pneumatically connecting the porous pad to a source of negative pressure; and Figure 5 is a plan view of a modified cover.
DETAILED DESCRIPTION OF THE INVENTION
The embodiment shown in the accompanying drawings is designed for use in treating burns to the hand.
It will be appreciated that various appropriate modifications are possible for treating burns to other parts of the body, such as feet, are within the scope of the invention.
Figures 1, 2 and 3 show apparatus (10) for treating wounds to the hands comprising a porous pad having a lower base (22), a middle section (24) and an upper section (26) incorporated within a cover ( 12) of low air porosity. The porous pad is in the form of a glove or mitten and may be constructed by fixing the upper section (26) to the base (22) while retaining the middle section (24) within the cavity so formed. Typically, the porous pad is a reticulated plastics foam, and may be formed by gluing or welding the separate sections together. When placed inside the pad, the hand is held in place with fingers spread by finger-separators (25) and V-cut type grooves (14). As shown in Figures 2 and 3, the foam may be shaped to provide for a separate supporting compartment (27) for the thumb to aid the attainment of the optimum positions of the fingers and thumb for healing.
However, this is not essential. The pad is preferably made from a reticulated foam such as polyurethane as described in PCT application WO 96/05873, polyvinylalcohol foam or a combination thereof.

Figure 3 shows the assembled pad after insertion into a cover (12). Cover (12) is an envelope formed from air-impermeable sheet material, e.g. polyurethane or polyolefin film, and is sized to encompass the glove-shaped porous pad. The distal end of the cover (12) has a large opening (not shown) which is closable by an easily re-sealable means (4) such as a zip-type seal used on food bags. The proximal end (8) includes a substantially impermeable pressure-sensitive acrylic resin adhesive (9), the underside of which is secured as an air-tight seal to the patient's skin. The proximal end (8) may be coated on its inner surface with a pressure-sensitive acrylic resin adhesive (9) in order to seal the cover to the patient's skin, e.g.
at the wrist or lower arm. Alternatively, the proximal end (8) may be sealed to the patient's wrist with a separate piece of adhesive tape, such as a polyurethane film coated with a pressure-sensitive adhesive. The proximal end (8) is open and is tapered as shown. By providing a taper, the proximal end can be cut to a size such that the opening will fit snugly around the patient's wrist. Attached to the cover (12) in the region of a central part of the porous pad is a connector (100). Connector (100) may be attached to the cover by adhesive.
Figure 5 is a plan view of a cover similar to cover (12) shown in Figure 3.
The same reference numerals are used to indicate corresponding parts. The cover shown in Figure 5 differs from that shown in Figure 3 in that the end (8) for attachment at the patient's wrist has a somewhat larger taper and is designed so that the end can be trimmed to suit the patient.
The connector (100) has a generally circular flange (101) whose underside face (i.e. the face which in use contacts the foam page 20) is formed with small projecting buttons. The construction of this aspect of the connector is as described in GB Patent Application No.
2,333,965. Instead of using a zip lock seal, a seal of the "~elcro"TM type can be used. In this embodiment, a zip lock seal (4) is formed from polyethylene and this is joined to the rest of the cover, which is formed from polyurethane, by adhesive tape.

Figures 4a to 4d show various views of the connector ( 100) and it will be seen that it comprises a molded plastics flange portion (101) and suction port having a centrally positioned spout (102) and aperture (106). The connector (100) is firmly attached to the cover by an adhesive. The spout extends through a hole cut in the cover and the upper surface of the flange ( 1 O 1 ) is bonded with adhesive to the cover ( 12). The spout ( 102) is sized to accept as a closely sliding fit, the end of a single or mufti-lumen tube (30) (Figure 3) which emerges from beneath the wound cover (12). Tube (30) may be constructed as described in co-pending patent application WO 97118007. Where a mufti-lumen tube is used, one lumen can be used for measuring the pressure at the burn site. It is also within the scope of this invention to irrigate the burn or other wound through one of the lumens or via a separate connector to the foam pad. The connector or connectors can be used to introduce drugs, e.g.
antibiotics, to the wound site. The cover drape (12) is preferably made from a flexible film of low air permeability such as polyurethane and may include a protective layer of polyethylene.
Suitable materials are described in GB Patent Application No. 2,333,965.
In use, the hand of a patient having a burn injury is introduced into the outer cover (12) via the end (8). Re-sealable opening (4) may then be opened and folded back to expose the injured hand. The hand is then introduced into the porous pad which may be pre-assembled or assembled in situ around the injured hand. In the latter case, it may be convenient to fix the upper section (26) to the lower base (24) by suturing or stapling, rather than gluing or welding the foam. With the foam pad in place encompassing the injured hand, the cover (12) is drawn over the porous pad and the opening (4) re-sealed.
Spout (102) is then connected by a tube to a suction pump, e.g. using the technique described in WO 97/108007.
Pulsed, intermittent or continuous negative pressure may be applied to the patient's hand in accordance with a program which may be controlled automatically by a control device associated with the pump as described in our above patent application.
Negative pressure therapy using the apparatus of the invention has been found to stimulate healing of burns and to reduce the progression of cell death beneath a burn injury. Also, by improving blood flow to the wound area, infection is controlled and granulation of the wound is stimulated.
One additional beneficial effect of therapy using the apparatus of this invention is that during therapy, the hand is held firmly in a half closed position, which is the optimum position for promotion of healing. This can be further encouraged by the introduction of a rigid or semirigid splint, e.g. of plastics, which is formed or molded into the desired shape, the collapsed dressing being strapped to the splint during or after application of the suction, so that the desired healing position can be maintained after release of the suction.
The suction pump is perfectly controlled by control means including a pressure transducer for monitoring pressure at the wound site as described in our above PCT
application. A timer device may also be associated with the pump to provide on/off operation if necessary at selected intervals. The apparatus may also include a canister located between the porous pad and the pump to collect wound exudate. Typically, the pump is a diaphragm pump but other types of pumps and equivalent components, such as vacuum bottles may be substituted. The apparatus may also be used with a wall suction source as described in GB
Patent Application No. 2,342,584.
The terms and expressions which have been employed are used as terms of description and not of limitation. Although the present invention relates mainly to partial-thickness burns, it is understood that the present invention may be used with open wounds as well as a possible treatment of pressure sores.

Claims (7)

1. Apparatus for stimulating healing of wounds which comprises an envelope for receiving an affected part of the body, said envelope including a substantially air-tight cover and a porous pad within the cover, said pad being adapted to contact the wound surface, and connection means for connecting the interior of the envelope to a source of negative pressure, wherein the cover has a re-sealable opening which permits the wound to be inspected at intervals.
2. Apparatus as claimed in claim 1 wherein the envelope comprises a glove, sock or sleeve.
3. Apparatus as claimed in claim 2 which is intended for treating wounds to the hand and comprises a glove formed from a flexible plastics or rubber foam and an external cover of air-impermeable sheet material.
4. Apparatus as claimed in claim 3 wherein the connection means comprises a tube which communicates with the foam within the cover.
5. Apparatus as claimed in any one of claims 1 to 4 wherein the source of negative pressure is a suction pump.
6. Apparatus as claimed in any one of claims 1 to 5 which includes a canister for collecting wound exudate.
7. Apparatus for stimulating healing of wounds which comprises an envelope for receiving an affected part of the body, said envelope including a substantially air tight cover and a porous pad within the cover, said pad being adapted to contact the wound surface, and connection means for connecting the interior of the envelope to a source of negative pressure, such that an area of below ambient pressure is formed between said substantially air-tight cover and said affected part of the body, wherein the cover has a re-sealable opening which permits the wound to be inspected at intervals.
CA002368085A 1999-04-22 2000-04-20 Wound treatment apparatus employing reduced pressure Active CA2368085C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GBGB9909301.5A GB9909301D0 (en) 1999-04-22 1999-04-22 Wound treatment apparatus employing reduced pressure
GB9909301.5 1999-04-22
PCT/GB2000/001566 WO2000064394A1 (en) 1999-04-22 2000-04-20 Wound treatment apparatus employing reduced pressure

Publications (2)

Publication Number Publication Date
CA2368085A1 CA2368085A1 (en) 2000-11-02
CA2368085C true CA2368085C (en) 2006-05-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA002368085A Active CA2368085C (en) 1999-04-22 2000-04-20 Wound treatment apparatus employing reduced pressure

Country Status (21)

Country Link
US (5) US7279612B1 (en)
EP (3) EP1171065B1 (en)
JP (4) JP4796230B2 (en)
CN (1) CN1173676C (en)
AT (1) AT356601T (en)
AU (1) AU772162B2 (en)
BR (1) BR0009867A (en)
CA (1) CA2368085C (en)
CR (1) CR6468A (en)
CY (1) CY1107664T1 (en)
DE (2) DE06027012T1 (en)
DK (1) DK1171065T3 (en)
ES (2) ES2280152T1 (en)
GB (2) GB9909301D0 (en)
HK (2) HK1044697A1 (en)
IL (2) IL145286D0 (en)
MX (1) MXPA01010614A (en)
PT (1) PT1171065E (en)
RU (1) RU2240763C2 (en)
WO (1) WO2000064394A1 (en)
ZA (1) ZA200107099B (en)

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US7776028B2 (en) 2004-04-05 2010-08-17 Bluesky Medical Group Incorporated Adjustable overlay reduced pressure wound treatment system
US7846141B2 (en) 2002-09-03 2010-12-07 Bluesky Medical Group Incorporated Reduced pressure treatment system
US7909805B2 (en) 2004-04-05 2011-03-22 Bluesky Medical Group Incorporated Flexible reduced pressure treatment appliance
US7998125B2 (en) 2004-05-21 2011-08-16 Bluesky Medical Group Incorporated Hypobaric chamber treatment system
US8100887B2 (en) 2004-03-09 2012-01-24 Bluesky Medical Group Incorporated Enclosure-based reduced pressure treatment system

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